Sash lock



R. D. WIRT nae. 1, 1931.

SASH LOCK Filed Dec. 30. 19 29 INVENTOR Rm: En BA /1w TTORNEY Patented Dec. 1, 1931 TENT; car es E BEN D. win'r, or. MIAMI BEACH, FLORIDA SASH LOCK Applicationfiled December 30, 1929. Serial No. 417,414.

This invention relates to a lock and has particular reference to-a'lock which is used for locking window sashes.

The object of the invention is to provide an improved, cheap, simple and effective look.

A further object of the invention is to provide a strong lock that may be readily applied without cutting or fitting.

Another object is'to provide a lock that cannot be pried open or jimmied, nor picked with a thin strip of metal or otherwise from the outside and between the sash rails.

A further object is to provide a lock that will not mar the sash or casing in operating.

Still another object is to provide a lock that will have no wearing parts and which may be thrown out of locking position when so required.

Still afurther object of the invention is to provide a lock which not only looks the window in entirely closed position, but one which will act as an effective look when the window is in a slightly raised position, if so desired.

According to theinvention the side rail of the upper sash is provided with a plate having a serrated or toothed inner face and whose lower end extends down through a recess in the base of a standard, which said standard has bearing portions which carry a locking ring which has a serrated or toothed portion for engaging the serrations on the plate so as to prevent the relative movement of the window sashes, said locking ring having a shoulder which engages a spring for releasably holding the ring in closed or open position.

The drawings illustrate an embodiment of the invention and the views therein are as follows:

Figure 1 is a fragmentary front elevational view of a window frame and the upper and lower sashes and shows the lock in locking engagement to prevent the raising of the lower sash or the lowering of the upper sash.

Figure 2 is a vertical sectional view on the line 2-2 of Figure 1 and shows the locking ring disengaged from the securing base, while the dotted lines show the position of said locking ring when the parts are locked.

Figure 3 is a view of the lock in side elevation, with the locking ring in locking position, and the supporting ear broken away to show the relation of the ring to the spring, and

Figure 4 is a top plan view of the lock 1 6 is the window casing or frame in which the upper sash 7 may be moved downward and'the lower sash 8'm0ved upward. Iii-Figure lthey are shown at their extreme posi tions andiwith the ring 9 engaging the teeth 11 on the strip 12. o

' This plate is fastened to the side rail of the upper sash 7 by means of screws 13 and its lower end is flush with the1top of the lower cross rail 14 and with the top of the top rail 16 ofthe lower sash, as shown at 17,

-when the sashesare in their extreme raised and lowered positions.

'- The top face'of the upper rail of the lower sash 16 is provided with a standard'which comprises a securing base 18 and upstanding bearing wings 19 through which is extended a 'pin21 for pivotally supporting the lock- 8 ing ring 22.

The securing base 18 is provided with out standing wings 23 through which screws 24: extend'for assisting the screw 26in securing the standard-to the rail and at the front end of these wings there is provided a recess 27 in which the lower end of the strip 12 slides. The width of the locking ring22 increases gradually on its inner side and terminates in a shoulder 28, as shown in Figure 2, while a series of teeth 29 are provided in its outer face so that when the locking ring is thrown forward into the position shown by the dotted lines, these teeth will engage with the teeth 11 on the strip 12. "If necessary, these teeth may be so made as to be slightly pointed upward so as to insure a positive gripping connection with the'teeth on the strip.

' The securing base 18 has secured thereto by the screw 26 or otherwise a spring 31 which normally inclines upwardly and bears against the face of the shoulder28 'so that when it is desired to throw the locking ring into engagement with the strip, the said shoulderin its movement must overcome the tension of the. spring 31 andwhen the said shoulder has tend to push against the point 32 and yieldingly bind the teeth of the ring and plate in engagement. By reversing the movement the ring will be yieldingly'held out of engagement.

On account of the position of the lock upon the window sashes, it will be impossible to jimmy the windows as by reason of the eccentricity of the toothed part 29 of the ring '22, stress will only increase the binding resistance. It will also be impossible to-introduce a flat strip of metal between the sashes to pry the lock open as when the sashesare in closed relation, as shown in Figure 2, the inner edges of the wings will extend over thetop-face of the lower rail Mot the upper sash, as at 33, and thesecooperating with the lower end of the strip'l2 will efl'ectively seal from the perimeter and mounted between the abutments by a pivot inserted through the said abutments and said offset, a spring between. the abutments bearing against the tapered sides of the offset at the limits of oscillation of the annulus, teeth upon an arc of the perimeter of the annulus, and a toothed strip-mounted for reciprocation and with the teethin position for interengagement by the teethof the annulus.

2. A sash lock comprising a plate having a notch. and integral spaced abutments, an approximately annular member having a reversely tapered shoulder offset from the perimeter and mounted between the abutments and said ofi'set, av spring'between the abutments bearing against the tapered sides of the ofisetl at the limits of oscillation of theannulus, teeth upon an arc of the perimeter of the annulus, and a toothed strip ment by the teeth of the annulus.

3. A sash. lock comprising spaced abutments, an. approximately annular member having a reversely tapered shoulder offset from the perimeter and mounted between the abutments by a pivot inserted through the said abutments and said ofi'set, a springbetween the abutments bearing against the tapered sides of the offset at the limits of V oscillation of the annulus, teeth upon an ar strip mounted for reciprocation and with the teeth in position for interengagement by the teeth of the annulus, and means securing the plate in operative position, said means also securing the spring to the plate.

4. A sash lock comprising a plate having a notch and integral spaced abutments, an approximately annular member having a reversely tapered shoulder offset from the perimeter and mounted between the abutments by a pivot inserted through the said abutments and said ofiset, a spring between the abutments bearing against the tapered sides of the oflset at the limits of oscillation of the annulus, teeth upon an arc of the perimeter vof the annulus, a toothed strip mounted for reciprocation in the notch and with the teeth in position for interengagement by the teeth of the annulus, and means securing the plate in operative position, said means also securing the spring, to the. plate.

In testimony whereof. I have signed my name to this specification.

REUBEN 1). WI-RT.

' mounted for reciprocation in the notch and with the teeth in position for interengageof the perimeter of the annulus, a 'toothed 

